Lecture notes by Peter Suber.

Article in the Stanford Encyclopaedia of Philosophy, by Edwin Mares.

Article by John Howes, presented at the 20th World Congress of Philosophy.

Essay by Hector Parr, considering some philosophical difficulties with `if'.

Essay by William S. Boardman discussing Fred Dretske's measles examples in his book `Knowledge and the Flow of Information'.

Lecture notes on the analysis of condition sentences by Paul Kay.

Discusses Charles Peirce's account of conditionals, hypotheticals, and what he takes from Cicero's account of the debate between Philo and Diodorus.